Swift - Cannot rename button before it is clicked

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I have problem with renaming a button. I have screen with some table view, where I have items e.g. - "first", "second", "third", ... I want to when I click on some item to get me on other screen, where will be button which will change the text based on which item I select. My problem is, when I click on first item e.g. "first", the Button has name "Button" not "first_detail" like I have in code bellow. I added Button like this:

@IBAction func testBtn(_ sender: AnyObject) {
    if names[myIndex] == "first" {
        sender.setTitle("first_detail", for: UIControlState.normal)
        self.performSegue(withIdentifier: "testSegue", sender: self)
}
    if names[myIndex] == "second" {
        sender.setTitle("second_detail", for: UIControlState.normal)
        self.performSegue(withIdentifier: "secondSegue", sender: self)
}
}

Thanks for advices.

You can set button title like this

var buttonTitle: String {
        didSet {
            self.yourbutton.setTitle(buttonTitle, for: .normal)
        }
    }

You can use

self.buttonTitle = "First"

ios - Swift - Cannot rename button before it is clicked, My problem is, when I click on first item e.g. "first", the Button has name "Button" not "first_detail" like I have in code bellow. I added Button like  Go to the storyboard and click the view controller icon in the scene. In the drop down menu, select Editor>Embed in>Navigation controller. Drag two buttons, one labeled Pizza and the other labeled Pasta out to the scene. Make the Pizza button white text on a red background.

Create a outlet for button in VC and set the title for a button instead sender

@IBOutlet weak var itemButton: UIButton!

and check is it going inside any of the if condition

@IBAction func testBtn(_ sender: AnyObject) {
    if names[myIndex] == "first" {
        itemButton.setTitle("first_detail", for: UIControlState.normal)
        self.performSegue(withIdentifier: "testSegue", sender: self)
    }
    if names[myIndex] == "second" {
        itemButton.setTitle("second_detail", for: UIControlState.normal)
        self.performSegue(withIdentifier: "secondSegue", sender: self)
    }
}

Learning Swift Programming, For now you can just print something when the button gets clicked. Change your methods to look like this: that you have not given Xcode enough information to calculate the constraint fully, and therefore it cannot properly position your item. Because the page is not really "rendered" until the handlers are finished. Therefore, if you are not seeing a change in the button then the code isn't getting called. I suspect that the event is not properly "wired" to the handler. Try adding a new button (outside of any tables) and doubleclicking the button to autocomplete the handler for you.

The reason your code isn't working is that an IBAction is triggered after the button is clicked. There is no way for the code to magically read your user's mind and change the text right before the button is clicked.

Create a property called 'buttonTitle' or something like that on your destination view controller. I prefer to avoid optionals if I can, so something like this would be what you want on the destination VC:

var buttonTitle = ""

If you're using a segue, then you need to override prepare(for:sender:) and set the buttonTitle property on the segue's destination view controller (this will require that you cast destination as your destination view controller's subclass). Something like this example (I'm just calling your destination VC's class MyDestinationVC. Replace it with the correct name):

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if let destinationVC = segue.destination as? MyDestinationVC {
        destinationVC.buttonTitle = names[myIndex]
    }
}

Or, if you're pushing/presenting manually from code, then before you put it on screen, set that same buttonTitle property.

Then, in your destination view controller's viewDidLoad() method, set the button's title based on the buttonTitle property.

override func viewDidLoad() {
    super.viewDidLoad()
    myButton.setTitle(buttonTitle, for: .normal)
}

Note: Other solutions that automatically update the button for you will cause crashes if called before viewDidLoad() because the views they're accessing will not have been initialized yet.

Swift Change UIButton Text, Learn how to use the Xcode IDE and the iOS SDK to build your first app. For now, you can't reference your newly created button in code. Create an outlet connection from the When you tap the button to change the color, the corresponding action, buttonPressed(_:) , executes. Click the Step over button Step Over icon  There are two situations where Windows interprets a left-click on a file or folder as a request to rename the file. It happens if the file is already highlighted in Windows Explorer and if it is left-clicked again, or if the user double-clicks on the file and the double-clicks are interpreted as two single clicks.

I have it these way:

  1. I define @IBOutlet weak var itemButton: UIButton!
  2. In action button i put only

    @IBAction func testBtn(_ sender: AnyObject) { if names[myIndex] == "first" { self.performSegue(withIdentifier: "testSegue", sender: self) } if names[myIndex] == "second" { self.performSegue(withIdentifier: "secondSegue", sender: self) } }

  3. To the second (target) VC i put these conditions

    if names[myIndex] == "first" { itemButton.setTitle("first_detail", for: UIControlState.normal) } if names[myIndex] == "second" { itemButton.setTitle("second_detail", for: UIControlState.normal) }

  4. it works as I need

Update the Button Text (Guided Project Light) Unit, Select the segue and change the animation from Default to Flip Horizontally. The only issue is that you cannot go back to the first view controller. Click the segue you created between the view controllers with the button and the label. view as a placeholder and imagine it as it would be rendered when the project is run. If you have trouble changing the file on the right hand side, click the button circled in this screenshot: Once you have both the xib file and the .m file visible, hold down “control” on your keyboard, click and drag the UIButton in the view over to the right hand side and drop it on an empty line just before “@end”.

More iPhone Development with Swift: Exploring the iOS SDK, A Problem-Solution Approach Mike Rogers. How It Works On When buttons are in the same group, only one can be selected at MomentaryLightButton) Set the title property to change the text displayed on the button: button.title = "Click Me! In Windows when you select a file and press the F2 key you can instantly rename the file without having to go through the context menu. At first glance, this shortcut seems rather basic. As seen in

Swift Recipes: A Problem-Solution Approach, Hi - I'm trying to get the text on a button to change to something different more than once. So for example, the button initially says "blue", then when. Button text to "Blue" in the Main storyboard by double-clicking on the button, and then using the But I can't work out how to change the text more than once. Then the user is to click on a letter (whether right or wrong) and then move on to the next for statement until all ten are done. How do I get the program to pause until the user selects a letter on the screen before moving on? The letters are buttons on the screen that are clicked on with a mouse by the kids. Here is what I have so far:

Changing button text multiple times |Apple Developer Forums, Adding logic that's triggered when the toolbar button is clicked. To learn how to Your app extension can force a state change to happen explicitly. Important. The Released event occurs when the finger or mouse button is released. Generally, a Clicked event is also fired at the same time as the Released event, but if the finger or mouse pointer slides away from the surface of the Button before being released, the Clicked event might not occur.

Comments
  • If you are aiming to pass data from vc to another by using performSegue, then we should ask: Have you implemented prepare(for:sender:) method?
  • When i define @IBOutlet weak var itemButton: UIButton! and use in code in every if condition, the name still not showing. Button has still name "Button". Thanks
  • are you setting the button title in storyboard ??
  • you should set any default title for button, else you will default text as button
  • whats the names dictionary ??
  • Thanks for explain. I progressed by your steps. In destination VC i put var buttonTitle = "", after that i put to second VC override func prepare(for segue: UIStoryboardSegue, sender: Any?) { if let destinationVC = segue.destination as? recTableViewController { destinationVC.buttonTitle = names[myIndex] } } and finally put this in destination VC override func viewDidLoad() { super.viewDidLoad() testBtn.setTitle(buttonTitle, for: .normal) .... but now i have error message Use of unresolved identifier 'testBtn' in destination VC
  • No, you have to override prepare for segue in the view controller you’re coming from. You put the buttonTitle variable in the one you’re going to